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Cheap flights from Ottawa to London Heathrow Airport from C$ 475

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
21 Aug — 28 Aug1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Ottawa to London Heathrow are usually found in January or September, booked 54 days in advance, depart on a Monday or Wednesday and return on a Monday

Cheap flight deals from Ottawa to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Ottawa to Heathrow
Explore the most affordable flight options available from Ottawa to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 July 2026.

Mon 12/104:00 p.m.
YOW
-
LHR
2 stops34h 55m
Multiple Airlines
Thu 15/106:00 a.m.
LHR
-
YOW
2 stops21h 10m
Multiple Airlines
Deal found 21/7C$ 740
Sun 6/98:50 a.m.
YOW
-
LHR
1 stop31h 10m
Air Canada
Sun 13/99:30 a.m.
LHR
-
YOW
1 stop9h 24m
Air Canada
Deal found 20/7C$ 855
Mon 7/96:55 p.m.
YOW
-
LHR
Nonstop6h 35m
Air Canada
Wed 23/92:10 p.m.
LHR
-
YOW
Nonstop7h 55m
Air Canada
Deal found 22/7C$ 867
Fri 23/106:25 a.m.
YOW
-
LHR
1 stop24h 30m
United Airlines
Sun 25/1011:05 a.m.
LHR
-
YOW
2 stops54h 06m
United Airlines
Deal found 19/7C$ 870
Fri 16/1011:15 a.m.
YOW
-
LHR
1 stop14h 15m
Air Canada
Fri 23/1012:40 p.m.
LHR
-
YOW
1 stop11h 00m
Air Canada
Deal found 18/7C$ 874
Mon 7/97:30 p.m.
YOW
-
LHR
1 stop9h 30m
Air Canada
Mon 14/99:30 a.m.
LHR
-
YOW
Nonstop7h 55m
Air Canada
Deal found 18/7C$ 877
Mon 12/106:55 p.m.
YOW
-
LHR
Nonstop6h 35m
Air Canada
Fri 16/108:40 a.m.
LHR
-
YOW
2 stops18h 30m
Air Canada
Deal found 21/7C$ 881

Find flight deals from Ottawa to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 22 July 2026.

Round-trip from

C$ 740

One-way from

C$ 475

Popular in

December

Cheapest in

January

Average price

C$ 1,275

Good round-trip deal

C$ 923 or less

Good one-way deal

C$ 489 or less
Air Canada
  • Air Canada
  • 12/10-15/10
  • 4 total stops
  • 56h 05m total
  • Ottawa to London
Search Deals
6/9
  • 6/9
  • 3 total stops
  • 45h 05m total
  • Ottawa to London
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (C$ 15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Ottawa to London Heathrow.
Search Deals
Price to beat on a one-way flight from Ottawa to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ottawa to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 22 July 2026.
Use the filters below to find and compare flights from Ottawa to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 24/10

2:00 p.m.-12:05 p.m.

2 stops17h 05m

London Heathrow

Mon 26/10

11:05 a.m.-1:11 p.m.

2 stops54h 06m

C$ 881

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 23/10

2:00 p.m.-11:55 a.m.

2 stops16h 55m

London Heathrow

Sun 25/10

11:05 a.m.-1:11 p.m.

2 stops54h 06m

C$ 881
Quickest round-trip

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 3/9

8:05 p.m.-11:50 a.m.

1 stop10h 45m

London Heathrow

Sun 13/9

9:30 a.m.-1:58 p.m.

1 stop9h 28m

C$ 917

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 14/10

6:00 a.m.-6:45 a.m.

3 stops19h 45m

London Heathrow

Mon 19/10

6:50 a.m.-11:54 p.m.

2 stops22h 04m

C$ 960

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 6/10

3:10 p.m.-10:40 a.m.

2 stops14h 30m

London Heathrow

Fri 16/10

6:50 a.m.-9:56 a.m.

2 stops32h 06m

C$ 963

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 31/8

5:57 p.m.-8:40 p.m.

1 stop21h 43m

London Heathrow

Wed 9/9

6:50 a.m.-4:38 p.m.

2 stops14h 48m

C$ 963

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 26/9

6:05 a.m.-6:55 a.m.

2 stops19h 50m

London Heathrow

Sun 18/10

12:15 p.m.-9:11 a.m.

2 stops25h 56m

C$ 972

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 6/9

5:20 p.m.-11:55 a.m.

1 stop13h 35m

London Heathrow

Sun 4/10

4:40 p.m.-11:54 p.m.

1 stop12h 14m

C$ 972

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 5/9

5:57 p.m.-9:20 a.m.

1 stop10h 23m

London Heathrow

Sat 12/9

10:25 a.m.-10:35 p.m.

1 stop17h 10m

C$ 972

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 11/10

6:25 a.m.-9:00 a.m.

1 stop21h 35m

London Heathrow

Sun 18/10

12:15 p.m.-10:35 p.m.

2 stops39h 20m

C$ 975

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/7

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Best time to book a flight from Ottawa to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Ottawa with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ottawa to London Heathrow Airport

How far ahead should I book a flight from Ottawa to London Heathrow Airport?

The best time to book flights from Ottawa to London Heathrow Airport is 53 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Ottawa to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of C$ 1,006). Flying from Ottawa to London Heathrow Airport in December is currently the most expensive (average of C$ 1,418). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YOW to LHR?

Find hourly flight availability from Ottawa to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 22 July 2026.

When flying from Ottawa to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Ottawa to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 22 July 2026.
Read reviews from past customers who have flown Air France,United Airlines, andAir Canada from Ottawa to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air France
7.5
Good
1,627 reviews
Check prices

Entertainment

7.0

Boarding

7.5

Comfort

7.4

Overall

7.5

Crew

8.2

Food

7.0

Reviews

1 / 20
8.0
Excellent

Florian,Feb 2025

YUL - CDG

Always a pleasure to travel with Air France. It might not be up to airline like Qatar or Singapour Airlines but I always find it reassuring flying with Air France.
Air France
7.5
Good
1,627 reviews
Air France
7.5
Good
1,627 reviews
Check prices

Entertainment

7.0

Boarding

7.5

Comfort

7.4

Overall

7.5

Crew

8.2

Food

7.0

Reviews

1 / 20
8.0
Excellent

Florian,Feb 2025

YUL - CDG

Always a pleasure to travel with Air France. It might not be up to airline like Qatar or Singapour Airlines but I always find it reassuring flying with Air France.
United Airlines
7.4
Good
10,024 reviews
Air France
7.5
Good
1,627 reviews
Check prices

Entertainment

7.0

Boarding

7.5

Comfort

7.4

Overall

7.5

Crew

8.2

Food

7.0

Reviews

1 / 20
8.0
Excellent

Florian,Feb 2025

YUL - CDG

Always a pleasure to travel with Air France. It might not be up to airline like Qatar or Singapour Airlines but I always find it reassuring flying with Air France.
Air Canada
7.1
Good
11,371 reviews
Air France
7.5
Good
1,627 reviews
Check prices

Entertainment

7.0

Boarding

7.5

Comfort

7.4

Overall

7.5

Crew

8.2

Food

7.0

Reviews

1 / 20
8.0
Excellent

Florian,Feb 2025

YUL - CDG

Always a pleasure to travel with Air France. It might not be up to airline like Qatar or Singapour Airlines but I always find it reassuring flying with Air France.
Lufthansa
6.8
Okay
8,159 reviews
Air France
7.5
Good
1,627 reviews
Check prices

Entertainment

7.0

Boarding

7.5

Comfort

7.4

Overall

7.5

Crew

8.2

Food

7.0

Reviews

1 / 20
8.0
Excellent

Florian,Feb 2025

YUL - CDG

Always a pleasure to travel with Air France. It might not be up to airline like Qatar or Singapour Airlines but I always find it reassuring flying with Air France.

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ottawa to London Heathrow?

    Most people fly from Ottawa (YOW) if they book a flight from Ottawa to London Heathrow. On average, Ottawa has 3 outbound flights to London Heathrow per day from 4 airlines. Ottawa is conveniently located just 10.6 km from Ottawa’s city centre.

  • How long is the flight from Ottawa to London Heathrow Airport?

    A quick flight from Ottawa to London Heathrow Airport can take about 10h 45m. United Airlines provides one of the quickest options available for as low as C$ 917. The distance between Ottawa and London Heathrow Airport is about 5343 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from Ottawa to London Heathrow Airport round-trip?

    Cheapflights users have booked flights from Ottawa to London Heathrow Airport round-trip from C$ 795. Other airlines that can offer you cheap pricing are United Airlines, from C$ 896, and Air Canada, from C$ 908. Air France is 29% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the most reliable airlines from Ottawa to London Heathrow Airport?

    The top 3 most reliable airlines when flying from Ottawa to London Heathrow Airport are Air Canada (67%), Aegean Airlines (67%) and Austrian Airlines (67%).

  • What are the cheapest flights from Ottawa to London Heathrow Airport?

    On average you can expect to pay C$ 1,138 for a flight from Ottawa to London Heathrow Airport. The cheapest flight overall is C$ 489 while the most popular route, (Ottawa - London Heathrow) is currently priced at C$ 740.

  • Can I find deals for flights from Ottawa to Heathrow that include hotel bookings?

    Yes. In addition to deals on Ottawa to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Heathrow.

  • Can I find deals for business class flights from Ottawa to Heathrow?

    Yes. Cheapflights offers flight deals from Ottawa to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ottawa to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of C$ 1,006). Flying from Ottawa to London Heathrow Airport in December is currently the most expensive (average of C$ 1,418). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Gatwick
Romford
Twickenham
Ilford
Bromley
Sutton
Luton
Slough
Marlow
Cobham
Hounslow
Leamington Spa
Northampton
Watford
High Wycombe
Stratford-upon-Avon
Moreton-in-Marsh

Browse thousands of different options on Cheapflights for your next trip

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Fly from Ottawa to Heathrow on these airlines

Choose from the following airlines for your flight from Ottawa to Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 22 July 2026.
Air Canada flights from Ottawa to London Heathrow
Lufthansa flights from Ottawa to London Heathrow
United Airlines flights from Ottawa to London Heathrow

Top 4 airlines flying from Ottawa to Heathrow

Discover the top 4 airlines that operate flights from Ottawa to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 22 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapestC$ 795AverageC$ 1,046FlexibilityNo cancel feeOn-time77%
Search Air France flights
United AirlinesCheapestC$ 896AverageC$ 1,236FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 908AverageC$ 1,129FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 927AverageC$ 1,169FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ottawa to Heathrow?

When you search for this flight from Ottawa to Heathrow, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Heathrow?

Millions of users choose and trust Cheapflights to book the best flight deals from Ottawa to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Ottawa to Heathrow with no change fees?

Yes, we can. To see specific flights from Ottawa to Heathrow with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Ottawa to Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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